Shade holder



May 25 1926. 1,585,744

P. VOGT 1 SHADE HOLDER Original Filed Dec. 15, 1921 Paul Va f. 851 hisalum/ Patented Wiley 25, 1926?.

PAUL voo'r, OF BADEN, SWITZERLAND.

SHADE HOLDER.

Application filed December 15, 1921, Serial No. 522,669, renewed October10, 1925, and, in Germany December The invention relates to an improvedholder for the shade or globe connected with incandescent electriclamps.

The main object of the invention is to provide for a positive, solidconnection be tween the metal socket of the lamp and a substantialinsulating holder on the one hand and between the holder and the shadeor globe on the other hand.

Another object is to avoid short circuit in attaching the metal shade byinsulating the metal connection between the insulating holder and themetal shade and placing it at a considerable distance from the metalsocket of the lamp.

Heretofore the holder for the globe generally consisted of a metal ringwhich con tained the fastenings screw for the shade and which wasclamped above a bead or the like provided at the free end of the lampsocket. This connection was more or less shaky, liable 'to get loose,and to allow of a displacement of the globe or shade.

According to this invention the holder for the shade or globe is made ofsolid insulating material in form of an inverted dish shaped flat ringor circular plate which has in the middle an opening having an upwardlyextending flange equipped inside with screw threads fitting uponcorresponding screw threads at the free end of the metal socket. Theouter rim of the flat ring or plate is shaped as a downwardly extendingflange which contains in fitting recesses, embedded between walls ofinsulating material, the metal bushings for the set screws. The screwsfor holding the shade are inserted into the metal bushing from theoutside through a hole in the outer walls of the recess and protrudethrough the inner wall of the recess which also has a hole correspondingto the screw-threaded hole in the bushing; the holes in the insulatingwalls on both sides of the bushing being preferably wider than thescrew-threaded hole, so that no pressure is exerted by the set screwimmediately upon the insulating material.

The accompanying drawing shows, by way of example, a suitable form inwhich the invention may be executed. Fig. 1 is a cross section, Fig. 8is a view from above, Fig. 4 a view from below; Fig. 2 shows a detailand Fig. 5 the armature mounted.

The outwardly extending ring a made of insulating material, for instanceporcelain, which forms the main body of the holder, contains in anupwardly extending inner flange screw threads which fit uponcorresponding threads at the free end of the metal base or socket of thelamp. This body a has a downwards directed border in which threerecesses 01' pockets 0 are provided in distances of 120 degrees one fromanother. 'lhe border is reinforced outside of said pockets by ledges ewhich extend over the plain portion of the body a to the inner screwthreaded flange. The ledges e and the border are pierced by perforationsc l. In each pocket 0 a little metal plate b, Fig. 2, is inserted andconveniently fixed therein by means of a suitable gluten, shellac f. ex.These plates 6 are provided with a female threaded hole for thereception of an attachment screw 8. The perforations d are a littlewider than the holes of the plates 6 and therefore do not participate inthe guide of the screws 8 set in the plates 6.

In Fig. 1 the nut or plate I) which consists of metal is indicated bycross-section lines which run in a direction different from that of thecross-section lines indicating the section through the ring a made ofinsulating material. The metal plate or nut 12 which is shown separatelyin Fig. 9., shows in the center the hole which is to be engaged by thescrew S indicated in Fig. 5.

What I claim as myinvention and desire to secure by Letters Patent, is1- 1. Insulating holder for the shade or globe of electric incandescentlamps consisting of a laterally extending insulating body which has inthe center a hole adapted to lit over the end of the lamp socket, and inthe downwardly extending outer rim recesses or pockets adapated toreceive metal bushings for the screws holding the shade or globe, and inthe inner and outer walls of the recesses or pockets, corresponding tothe screw threaded hole of the bushing, holes which are a little widerthan the hole of the bushing. I

2. Insulating holder for the shade or globe of electric lamps comprisinga plateshaped ring, which has in the center a hole adapted to tit overthe screw-threaded end IOU of the lamp socket, and at the outer border adownwardly projecting flange having at the points, Where the holdingscrews for the shade or globe are to be inserted, recesses 01' pocketsadapted to receive metal bushings for the holding screws, and in theinsulating outer and inner Walls of the recesses or pockets,corresponding to the screw-threaded hole of the metal bushing, holesWhich are Wider than the hole of the bushing.

In testimony whereof I afiix my signature.

PAUL VOGT.

